Apparatus for lighting and extinguishing gas-lights from a distance.



J. I. NASSI'IN & A. E. T. BERGSTRUM.

APPARATUS FOR. LIGHTING AND EXTINGUISHING GAS LIGHTS FROM A DISTANCE.AYPLIOATION IILED MAY 5. 1909.

940,046. Patented Nov. 16 1909.

. jnvamtom wj m e we 8 WWW 'be constructed according to the one or theUNITED STATES PATNT OFFICE.

JOHN rar'rror Nlissniv AND AXEL EDVIN THEODOR BERGsTRoM, or STOCKHOLM,SWEDEN.

APPARATUS FOR LIGHTING AND EXTINGUISHING GAS-LIGHTS FROM A DISTANCE.

To all whom it may concern: I

Be it known that we, JOHN Farrier Nla'st sex and Axial. Eovm THnonor.Bnnosrnoar, subjects of the King of Sweden, residing at Stockholm, inthe kingdom of Sweden, have jointly invented new and useful Improvementsin Apparatus for Lighting and EX- tinguishing Gas-Lights from aDistance, of which the following is a specification, reference being badto the drawing accompanying and forming a part hereof.

This invention relates to apparatus for lighting and extinguishing gaslights from a distance.

Several apparatus have heretofore been constructed for lighting andextinguishing gas lights from a distance. These apparatus are generallyconstructed either so that the lighting is effected by raising and theextinguishing by lowering the gas pressure, or so that the lighting aswell as the extinguishing is performed by a series of increases ofpressure. Whether the apparatus other principle, it must always bearranged so as notto be actuated by slow variations in gas pressure dueto irregularities in the manufacture and consumption of gas, frictionsin the gas conduits, different heights of the lamps etc. In order tofulfil this requiren'ient, it has been proposed to place the diaphragmactuated by the gas pressure and acting in its turn on the gas valve asa partition between two closed chambers connected to each other througha narrow passage in such a manner that the pressure can only slowlyexpand from the one chamber to the other. A slow variation in pressureat one side of the diaphragm will thus have no influence on thediaphragm, since the pressure has time to spread to the other side ofthe diaphragm. When, on the other hand, a rapid change in pressure takesplace, the diaphragm is moved and actuates the gas valve. in theseapparatus it is, however, connected with great difficulties to obtain asulliciently great movement of the diaphragm without too much increasingthe dimensions of the apparatus, since even a very small movement of thediaphragm produces a considerable change of pressure in the chamber,provided said chamber is not very large. lhe apparatus will, therefore,be big and bulky and in a serious degree spoil the appearance of thelamps.

Specification of Letters Patent.

Application filed May 5, 1909.

Patented Nov. 16, 196%).

Serial No. 494,167.

The object of this invention is to provide an apparatus of the said kindwhich not only fulfils the requirement that the apparatus is notoperatedby slow variations in gas pressure but at the same time removes thedrawback hereinbefore set forth.

The invention consists, chiefly, in the com bin-ation with the gasvalve, of a diaphragm or the like operatively connected to the said gasvalve, and a second, independently movable diaphragm, suitably of largerextension than the former, said two diaphragms forming between them aclosed chamber comiunicating through a narrow passage with the outerair, so that the valve-operating diaphragm will be actuated when thesecond diaphragm is rapidly moved by changes of pressure.

The invention further comprises the construction and combination ofparts hereinafter more particularly described.

In the drawing we have shown a vertical section of an apparatusembodying the invention.

Referring to the drawing, the apparatus is shown provided with three(llZtIJllI'flgillS, one 1 of which is larger than the two others 2 and3, which are of about the same size and firmly connected together by oneor more rods 4; so that the one diaphragm always partakes in themovements of the other. Situated between the diaphragms 1 and 2 is achamber 5 communicating through a narrow passage 6 with the outer air.Screwed into the said passage is a regulating screw 7 by which thesectional area of the passage may be regulated. Placed in the chamber 5is a blade-spring 8 the free ends of which bear on the upper side of thediaphragm 1 so that the spring counteracts the gas pressure acting onthe lower side of the. diaphragm. The spring is adjusted for an averagegas pressure, for instance corresponding to a column of water of aheight of 50 millimeters, and need not be provided with any regulatingdevice, it being of no importance if the diaphragm l bellies slightlyupward or downward.

The gas valve 9 is placed in the chamber 10 between the diaphragms 2 and3, which chamber communicates through a passage 11 with the chamber 12below the diaphragm l and through the latter chamber with the gas supplyconduit 13. A pipe 14: extending into the chamber 10 carries a seat 15for the valve disk 9 attached by a ball-and-socket joint or otherwise tothe diaphragm 3. This diaphragm is further connected by an arm 16 to alever 18 pivoted at 17. The lever 18 carries a shiftable weight 19 andis bent at its free end toward the side so as to enter into a groove 20in the surface of a cylinder 21. The latter is rotatably mounted invertical position in an arm 22 screwed on to the bottom plate 23. Thepipe 14 communicates through a tube 24 with the passage 25 leading tothe jettips or main burner while the pilot-burner is supplied with gasthrough a narrower tube 26 issuing from the chamber 10 between thediaphragms 2 and 3. For protecting the parts of the apparatus said partsare inclosed in a casin 27 having a small aperture 28 for smoothing outalterations of pressure in the interior of the apparatus.

The gas enters through the conduit 13 into the chamber 12 from" which itpasses through the passage 11 into the chamber 10. However, inasmuch asthe diaphragms 2 and 3 are of about the same size and connected to eachother, the gas pressure cannot pro duce any movement of the diaphragms,and, on account thereof, the valve 9 remains closed, while, on the otherhand, the gas can freely pass through the tube 26 to the pilotburncr.Slow fluctuations of pressure have no influence on the valve, for evenif the diaphragm 1 on account thereof rises and sinks, the compressionor rarefaction thereby arising in the chamber 5 is smoothed out throughthe narrow passage 6. If, on the other hand, the pressure in the conduit18 is rapidly increased, the diaphragm 1 rises so rapidly that the airhas no time to es cape through the passage 6 but the pressure ispropagated through the chamber 5 to the diaphragm 2 and causes thelatter as well as the diaphragm 3 connected thereto to rise and therebyopen the valve 9. On account of the diaphragm 2 being smaller than thediaphragm 1, the former will obviously move a correspondingly greaterdistance. It is, however, obvious that the valve 9 cannot be liftedhigher than admitted by the groove 20 in the cylinder 21. hen the valverises or sinks, the cylinder turns, whereby the movement of the lever 18is determined by the shape of the groove 20. By giving the groove asuitable form it will thus be possi ble to open the valve 9 by a desirednumber of increases of pressure. The closing of the valve is produced inlike manner by a certain number of increases of pressure dependent onthe form of the adjacent part of the groove 20 The apparatus is thus controlled solely 'by rapid increases of pressure which are considerablyeasier to produce than decreases of pressure.

It is obvious that the embodiment shown and described is merely anexample of carrying the invention into efiect and may be modified invarious ways Without departing from the principle of the invention.Thus, for instance, the mechanism by which the movement of the diaphragm2 is trans mitted to the gas valve may be arranged in any other suitableway.

e claim:

1. In an apparatus of the character described, the combination of a gasvalve, a diaphragm operatively connected to the said gas valve, and asecond diaphragm movable independently of the former, said latterdiaphragm forming together with the former a closed chambercommunicating through a narrow passage with the outer air, substantiallyas and for the purpose set forth.

2. In an apparatus of the character de scribed, the combination of a gasvalve, a diaphragm adapted to actuate the said gas valve, and a seconddiaphragm of larger extension plaoed at a distance from the former, saiddiaphragms forming between them a closed member communicating through anarrow passage with the outer air, substantially as and for the purposeset forth.

JOHN FRI'IIOF NKSSEN.- AXEL EDVIN THEODOR BERGSTRGM.

itnesses AUG. SoRENsEN, ANNA SonnRsTRoM.

